Reduce nesting in LUInstanceCreate.RunOsScripts
Reduce nesting in LUInstanceCreate.RunOsScripts

This avoids a pylint too-many-nested-blocks warning.

NB it's hard to see from the diff because of all the whitespace, but
this just replaces the top "if iobj.disk and not self.adopt_disks" with
a pair of guards that return early, and dedents the rest of the fn.

git diff -w will show this.

No functional change.

Signed-off-by: Brian Foley <a00e555871a6a538e97f8c44307104c884f8e869@google.com>
Reviewed-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>

yiannist/ganeti,mbakke/ganeti,mbakke/ganeti,yiannist/ganeti,ganeti/ganeti,andir/ganeti,andir/ganeti,andir/ganeti,yiannist/ganeti,onponomarev/ganeti,onponomarev/ganeti,ganeti/ganeti,mbakke/ganeti,ganeti/ganeti